Coil-terminal.



J. E. MATEER... COIL TERMINAL. APPLICATION FILED FEB. 1. 1913.

1 177,346. Patentd Mar. 28, 1916.

WHNESSES: 6 w

i 45 as shown in the sketches.

UNITED STATES PATENT OFFICE.

JESSE E. MATEEB, OF WILKINSBURG, PENNSYLVANIA, AS SIGNOR T WESTINGHOUSEELECTRIC AND MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.

COIL-TERMINAL.

Specification of Letters Patent.

Patented Mar. 28, 1916.

Application filed February 7, 1913. SerialNo. 746,788.

To all whom it may concern:

Beit known that I, JESSE E. MATEER, a citizen of the United States, anda resident of VVilkinsburg, in the county of Allegheny and State ofPennsylvania, have invented a new and useful Improvement inCoil-Terminals, of which'the following is a specification.

My invention relates to'binding posts for electrical apparatus andparticularly to binding posts adapted for attachment to coils in, orderto form the terminals thereof.

The object of my invention is to provide a simple andinexpensive-binding post or terminal member for a coil that may besecured thereto with a small amount of labor prior to impregnating thecoil with an insulating compound, and that is so constructed as topermit o f-ready and thorough cleaning after impregnation of the coil sothat good electrical connections may be made therewith.

A further object is to provide the binding post or terminal member witha shield or 25 guard whereby the insulation of the coil is protectedfrom injury by the means for making connections to the member.

My invention is illustrated in theaccompanying drawing, Figure 1 ofwhich is a 80' plan view of a device embodying my invention and appliedto a coil, only a portion of which is shown. Fig. 2 is a side view ofthe device of Fig. -1, the insulation of' the coil to which it isapplied being shown partially in section.

The present device comprises a frame 1 made from a stripof sheet metalthat is folded, and the lower ply of which is straight, while the upperply isbent to pro- I 40 vide an intermediate inverted U-shaped bridge 2having an aperture for the reception of a clamping bolt 3. A terminallead 4 of a coil 5, is soldered between the'folds of an extension on theframe, substantially In applying the frame 1 to the coil '5, it is heldin position upon the first, or primary, layer of insulation upon thecoil, and the tape constitute ing tne secondary or subsequent layer ofinsulation is wound overthe fiat end portions of the frame in order tosecure the same in position. The frame 1 is preferably applied to thecoil, in the manner indicated, prior to the impregnation of the coilwith 66 a suitable insulating compound, the hardening of which assistsin securing the frame v or irregularly surfaced to the coil. Theinsulating compound is then removed from the upper and lower faces ofthe bridge to permit of. making good electrical connections therewith.An apertured clip 6, that is secured to the end of a conductor to beconnected to the terminal of the coil,is placed against the upper faceof the bridge, and the clamping bolt 3 is then inserted and a nut 7 isapplied to its lower end, for the purpose of clamping the terminal cliptightly against the upper and lower faces of the bridge, a washer 8being preferably interposed between the clip 7 and the head of the bolt.I By reason of the simplicity of the shape of the terminal device, itmay be readily and thoroughlycleaned so that good electrical connectionsmay be made thereto and,

since the clamping bolt 3 is not attached to the frame when the coil isimpregnated, the cleaning of threaded, or other rough auxiliary parts,is avoided. By reason of the provision of the bridge 2, the connectionsto the device may be readily made. The lower ply of the frameconstitutes prevents injury to the insulation of the coil that mightoccur either because of length of the shank of the bolt, or bytools'u'sed in making connections to the device.

I claim as my invention:

1. An electrical terminal comprising a metal piece folded to have abase, a two-ply lateral extension at each side of said base, an

intermediate portion of one ply that isa shield or guard that 3. Anelectrical terminal comprising a single metal piece folded to have abase, a lateral two-ply extension at each side of said base, anintermediate substantially U- shaped portion of one ply that is spacedfrom the base, and means for inserting a conductor between the metalparts forming one of the two-ply lateral extensions.

4. An electrical terminal comprising asingle metal piece folded to havea one ply from the said one ply base,

base,-tWo two-ply extensions thereto, a one ply intermediate portionthat is spaced means for inserting a conductor between the metal partsof one of thetWo-ply extenslons, and means" for attaching a conductor tothe portion that is spaced from the base.

5. An electrical terminal comprising a, single metal piece that isfolded to have a one ply base, a one ply substantially U- shaped portlonspaced from the base, two two-ply extensions forming a part of the base,and means for attaching a conductor to said U-shaped portion.

6. electrical terminal for 'a coil of 15 wire comprising a single metalplece folded 'to form a single ply base member-having two-ply extensionsfor attaching the same to the coil of Wire, and a single ply bridgeportion that is spaced from said base.

In testimony whereof, I have hereunto subscribed my name this 30th dayof J anuary, 1913.

JESSE E. 'MATEER.

Witnesses? GORDON A. Bonn,

B. B. I-lmns.

